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    "wlbNpdidWellbore" : 460,
    "wlbName" : "30/3-4",
    "wlbHistory" : "\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eAppraisal well 30/3-4 was drilled on the Veslefrikk Field.\r\nThe primary objectives of the well were to investigate possible oil\r\naccumulations in sandstones in Ness and Etive Formations, and to determine the\r\noil/water contact. Secondary objective was sandstone of the Early Jurassic\r\nDunlin Group.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWildcat well 30/3-4 was spudded with the\r\nsemi-submersible installation Deepsea Bergen on 5 February 1985 and drilled to\r\nTD at 3287 m in Early Jurassic sediments of the Statfjord Formation. Drilling\r\nwent without problems to a depth of 1788 m. While running the 13 3/8"\r\ncasing a wedge got stuck in the BOP and locked the casing. A technical\r\nsidetrack was decided. The sidetrack was kicked off from 790 m, and drilled to\r\n1792 m. An attempt to set 13 3/8" casing at this depth was unsuccessful,\r\nas the shoe got stuck at 1178 m. The casing was cut at 872 m and a second\r\ntechnical sidetrack was kicked of from 630 m. The problems encountered while\r\nrunning casing might have been caused by differential pressure between the\r\nUtsira sand and a sand at 1700 m. A total of 4 weeks was spent on the 17\r\n1/2" section before the 13 3/8" casing was finally in place. Drilling\r\nto TD proceeded without further problems. The interval below 3131 m was drilled\r\nwith turbine. The well was drilled with seawater and hi-vis pills to 248 m,\r\nwith gel/seawater from 248 m to 606 m, and with KCl/polymer mud in the 17\r\n1/2" section from 606 m to 1605 m. In the final 17 12/2" sidetrack\r\nfrom 630 m "Torq Trim" and 7% diesel was added to the mud. The 12\r\n1/4" section from 1605 m to 2812 m was drilled with KCl/polymer mud, and\r\nthe 8 1/2" section from 2812 m to TD was drilled with\r\nLignite/Lignosulphonate mud. \u003c/p\u003e\r\n\r\n\u003cp\u003eHydrocarbons were encountered in both Ness and Etive Formations and in the secondary target, the Cook Formation. Top reservoir in\r\nthe Brent Group is at 2843 m, and the oil/water contact is at 2930 m. Top Cook\r\nF",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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